Field-coil structure



No 750,980. PATENTED FEB. 2, 1904. G. H. KALER.

FIELD COIL STRUCTURE. APPLICATION FILED AUG.Y5, 1902.

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2 WTNE/ESSES: INVENTOFQL mw charlesHKaler z MW b guw No. 750,980. PATENTED FEB. 2, 1904. G. H. KALER.

1 FIELD COIL STRUCTURE.

APPLICATION FILED AUG. 5, 1902.

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UNITED STATES CHARLES H. KALER, OF SCHENECTADY, NEIV YORK, ASSICNOR TO GEN- ERAL ELECTRIC COMPANY, A

Patented February 2, 1904.

PATENT OFFICE.

CORPORATION OF NEW YORK.

FIELD-COIL STRUCTURE.

SPECIFICATION forming part of Letters Patent No. 750,980, dated February 2, 1904.

Application filed August 5, 1902.

To all whom, it Heavy concern:

Serial No. 118,484. (No model.)

the insulated conductor 1 or 2 is wound on a Be it known that I, CHARLEs H. KALEE, a former as usual until the inner section of the 5 citizen of the United States, residing at Schencoil is completed. The wooden space-blocks ectady, county of Schenectady, State of New 3 are then laid longitudinally against the out York, have invented certain new and useful side of the section and spaced evenly apart, Improvements in Field-Coil Structures, of and the winding is continued outside of and which the following is a specification. upon said blocks until the one or more outer 55 This invention relates to dynamo-electric sections are nearly completed. Flexible tasmachines; and its object is to improve the contenings, such as cords &, are then laid upon struction of the field-coils of such machines in the outside of the coil at regular distances order that a ventilated coil may be produced apart and two or more finishing-layers of the at low cost having a strong rigid structure in conductor are wound outside of them. The 60 which no metal is used except the copper conwinding thus binds the space-blocks 3 and the ductor composing the coil proper. I accom cords 4E firmly in place. The coil is then re- 5 plish this end by winding the coil in two conmoved from the former, and annular end plates centric sections separated by longitudinal 5, of wood or other light rigid cheap matewooden space-blocks and protecting the ends rial, are laid against'its ends. The plates have 5 of the coil by annular end plates of wood or a series of slots 6 concentric with the edges other cheap rigid material containing slots thereof and registering withthespacc between registering with the space between the secthe sections of the coil, so that each plate is tions of the coil and firmly lashed to the coils composed of two concentric rings united by by cords or other flexible fastenings passing short integral radial bridges, which are so 7 through said slots along each side of the spacespaced that they coincide with the spaceblocks. The edges of the end plates may be blocks. The ends of the cords l are passed 5 secured by cords passing under the outer laythrough holes 7- in the end plates and are tied ers of the outer coil-section and through holes tightly to keep the edges of the end plates near the edges of said plates. The coils may from warping away from the coil. Flexible 7 5 consist of as many sections as may be desiri'astenings, such as cords S, are then passed able and may comprise either a series windthroughthe slots 6 and the space between the 3 ing of flat copper ribbon or a shunt-winding coil-sections on each side of the space-blocks of smaller copper wire or a compound wind- 3, and after being pulled tight said cords arc ing consisting of a series coil and a shunt-coil tied over the bridges to retain the end plates grouped together in one structure. on the coil and clamp the whole into a solid In the accompanying drawings, Figurelis structure. The bridge may be cut away a perspective view of a coil comprisinga comslightly to let the cords 8 in flush with the surpound winding wound in two concentric secface of the plates, as shown most clearly in tions, the series winding being superposed Fig. 5. 3 5 upon the shunt-windin Fig. 2 is a side ele- If a compound-wound coil is to be made, vation of the same, partly in longitudinal secthe series winding 1 may be superposed upon 4 tion. Fig. 3 is a similar view showing the series winding concentric with the shunt-winding, each coil comprising one section only. Fig. 4c is a similar view of a shunt-coil having two concentric sections. Fig. 5 is a longitudinal section on the line 5 5, Fig. 2. Fig. 6

shows a portion of a coil with removable shaping-keys.

In making a coil according to my invention the shunt-winding 2., as in Figs. 1 and 2, or

it may be concentric therewith, as in Fig. 3.

In either case it may be in one or more sec- 9 tions, as desired. An annular plate 9, similar to the end plates, is interposed between the two coils when one is superposed upon the other and the cords 4i 8 are carried through both coils and tied upon the outside of the end 9 5 plates, as before, to clamp the entire structure solidly together. he terminals of the series winding are seen at and of the shunt-winding at 11.

When a coil of this construction is placed upon a pole-piece of a generator, it will of course be properly insulated therefrom by paper or mica.

If it is desired to have the outer coil-sections true cylinders, removable shaping-keys 12 may be laid between the space-blocks 3, each key being the segment of a cylinder, so that the keys and space-blocks will present a continuous cylindrical surface on which the next outer coil-section can be wound. After the coil is finished the shaping keys are knocked out, leaving the spaces between the space-blocks for ventilation. This mode of construction is especially advantageous where the conductor is a flat ribbon wound edgewise.

What I claim as new, and desire to secure by Letters Patent of the United States, is

1. A field-coil comprising two or more concentric sections separated by space-blocks, end plates having slots registering with the spaces between said blocks, and flexible fastenings passing through said slots and spaces and securing the parts together.

2. A field-coil comprising two or more concentric sections separated by space-blocks, end plates having slots registering with the space between the coil-sections, and cords passing down each side of said space-blocks and around the bridges of the end plates be tween said slots.

3. A field-coil comprising two or more concentric sections with an annular space between them, wooden end plates having slots registering with said annular space, longitudinal blocks in said space in line with the bridges of the end plates between said slots, cords passing through said slots and space and tied over the bridges, and other cords lying under the outer layers of the outer section and tied through holes near the edges of the end plates.

4:. A field-coil having end supports held by means of longitudinal cords confined between layers of its winding.

5. A field-coil having longitudinal cords confined between layers of its winding, and wooden end plates provided with holes through which said cords are passed and tied.

6. A field-coil comprising two concentric cylindrical sections wound successively, with space-blocks between said sections, and removable shapingkeys between the spaceb'locks to maintain the outer section in a true cylindrical form.

In witness whereof I have hereunto set my hand this 4th day of August, 1902.

CHARLES H. KALER.

Witnesses:

BENJAMIN B. HULL, J 0s. A. L. ENDRES. 

